<template>
  <div class="app-container">
    <div class="filter-container">
      <el-input
        v-model="listQuery.title"
        clearable
        placeholder="书名"
        style="width: 200px"
        class="filter-item"
        @keyup.enter.native="handleFilter"
        @clear="handleFilter"
        @blur="handleFilter"
      />
      <el-input
        v-model="listQuery.author"
        clearable
        placeholder="作者"
        style="width: 200px"
        class="filter-item"
        @keyup.enter.native="handleFilter"
        @clear="handleFilter"
        @blur="handleFilter"
      />
      <el-select
        v-model="listQuery.category"
        placeholder="分类"
        clearable
        class="filter-item"
        @change="handleFilter"
      >
        <el-option
          v-for="item in categoryList"
          :key="item.value"
          :label="item.label"
          :value="item.label"
        />
      </el-select>
      <el-button
        v-waves
        class="filter-item"
        type="primary"
        icon="el-icon-search"
        style="margin-left: 10px"
        @click="forceRefresh"
      >
        查询
      </el-button>
      <el-checkbox
        v-model="showCover"
        class="filter-item"
        style="margin-left: 5px"
        @change="changeShowCover"
      >
        显示封面
      </el-checkbox>
    </div>
    <el-table
      :key="tableKey"
      v-loading="listLoading"
      :data="list"
      border
      fit
      highlight-current-row
      style="width: 100%"
      @sort-change="sortChange"
    >
      <el-table-column
        label="ID"
        prop="id"
        sortable="custom"
        align="center"
        width="80"
        :class-name="getSortClass('id')"
      />
      <el-table-column label="书名" width="250" align="center">
        <template slot-scope="{ row: { titleWrapper } }">
          <span v-html="titleWrapper" />
        </template>
      </el-table-column>
      <el-table-column label="作者" width="250" align="center">
        <template slot-scope="{ row: { authorWrapper } }">
          <span v-html="authorWrapper" />
        </template>
      </el-table-column>
      <el-table-column
        label="出版社"
        prop="publisher"
        width="250"
        align="center"
      />
    
      <el-table-column
        v-if="showCover"
        label="封面图片"
        width="350"
        align="center"
      >
        <template slot-scope="scope">
          <a :href="scope.row.cover" target="_blank">
            <img :src="scope.row.cover" style="width: 200px; height: 180px" />
          </a>
        </template>
      </el-table-column>
      <el-table-column width="150" label="语言" prop="language" align="center" />
     
    </el-table>
    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="listQuery.page"
      :limit.sync="listQuery.pageSize"
      @pagination="refresh"
    />
  </div>
</template>

<script>
import { listBook, getCategory, deleteBook } from "@/api/book";
import waves from "@/directive/waves";
import { parseTime } from "@/utils";
import Pagination from "@/components/Pagination";
import PreviewDialog from "./components/PreviewDialog";

export default {
  name: "BookList",
  components: { Pagination, PreviewDialog },
  directives: { waves },
  filters: {
    timeFilter(time) {
      if (time) {
        return parseTime(time, "{y}-{m}-{d} {h}:{i}");
      } else {
        return "无";
      }
    },
    valueFilter(value) {
      if (value) {
        return value;
      } else {
        return "无";
      }
    },
  },
  data() {
    return {
      tableKey: 0,
      list: null,
      total: 0,
      listLoading: true,
      downloadLoading: false,
      listQuery: {},
      showCover: true,
      categoryList: [],
    };
  },
  created() {
    this.parseQuery();
  },
  mounted() {
    this.getList();
    this.getCategoryList();
  },
  beforeRouteUpdate(to, from, next) {
    if (to.path === from.path) {
      const newQuery = Object.assign({}, to.query);
      const oldQuery = Object.assign({}, from.query);
      if (JSON.stringify(newQuery) !== JSON.stringify(oldQuery)) {
        this.getList();
      }
    }
    next();
  },
  methods: {
    wrapperKeyword(k, v) {
      function highlight(value) {
        return '<span style="color: #1890ff">' + value + "</span>";
      }
      if (!this.listQuery[k]) {
        return v;
      } else {
        return v.replace(new RegExp(this.listQuery[k], "ig"), (v) =>
          highlight(v)
        );
      }
    },
    parseQuery() {
      // 收集查询条件
      const query = Object.assign({}, this.$route.query);
      let listQuery = {
        page: 1,
        pageSize: 20,
        sort: "-id",
      };
      if (query) {
        query.page && (query.page = Number(query.page));
        query.pageSize && (query.pageSize = Number(query.pageSize));
        listQuery = {
          ...listQuery,
          ...query,
        };
      }
      this.listQuery = listQuery;
    },
    refresh() {
      this.$router.push({
        path: "/book/list",
        query: this.listQuery,
      });
    },
    changeShowCover(value) {
      this.showCover = value;
    },
    getCategoryList() {
      console.log("商品目录");
      /* getCategory().then(response => {
          this.categoryList = response.data
        }) */
    },
    getList() {
      this.listLoading = true;
      listBook(this.listQuery).then((response) => {
        const { data, total } = response;
        this.list = data;
        this.total = total;
        this.listLoading = false;
        this.list.forEach((book) => {
          book.titleWrapper = this.wrapperKeyword("title", book.title);
          book.authorWrapper = this.wrapperKeyword("author", book.author);
        });
      });
    },
    handleFilter() {
      this.listQuery.page = 1;
      this.refresh();
    },
    forceRefresh() {
      window.location.reload();
    },
    sortChange(data) {
      const { prop, order } = data;
      if (prop === "id") {
        this.sortByID(order);
      }
    },
    sortByID(order) {
      if (order === "ascending") {
        this.listQuery.sort = "+id";
      } else {
        this.listQuery.sort = "-id";
      }
      this.handleFilter();
    },
    handleCreate() {
      this.$router.push("/book/create");
    },
    handleUpdate(row) {
      this.$router.push(`/book/edit/${row.fileName}`);
    },
    handleDelete(row) {
      this.$confirm("此操作将永久删除该电子书, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      }).then(() => {
        deleteBook(row.fileName).then((response) => {
          this.$notify({
            title: "成功",
            message: response.msg || "删除成功",
            type: "success",
            duration: 2000,
          });
          this.handleFilter();
        });
      });
    },
    getSortClass: function (key) {
      const sort = this.listQuery.sort;
      return sort === `+${key}`
        ? "ascending"
        : sort === `-${key}`
        ? "descending"
        : "";
    },
  },
};
</script>